Are there tornadoes when a cold front and warm front meet?

Answer 1

No. When a cold front meets a warm front you get an occluded front. A simple cold front is more likely to produce severe weather than an occluded front is. This is a common source of confusion as a colf front is what forms when coooler air pushes into warmer air. Tornadoes are often associated with cold fronts, but the front is not the direct cause. When a cold front moves through and there is enough instanility ahead of it, thunderstorms can form, but only when a number of other conditions are present can these storms produce tornadoes.

Answer 2

No. Tornadoes produce very strong winds, but are associated with warm weather. You are probably thinking of a blizzard.